Record Display for the EPA National Library Catalog


Main Title Exhaust emissions from high-mileage, catalyst-equipped passenger cars /
Author Jones, Gary T.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Test and Evaluation Branch.
Publisher U.S. Environmental Protection Agency, Motor Vehicle Emission Laboratory, Emission Control Technology Division, Test and Evaluation Branch,
Year Published 1981
Report Number EPA-AA-TEB-81-20
Stock Number PB82-103326
OCLC Number 785226818
Subjects Automobiles--Fuel consumption--Measurement. ; Automobiles--Motors--Exhaust gas. ; Automobiles--Catalytic converters. ; Automobiles--Pollution control devices.
Additional Subjects Air pollution ; Exhaust emissions ; Automobiles ; Hydrocarbons ; Carbon monoxide ; Maintenance ; Catalyst reactors(Exhaust systems)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA AA-TEB-81-20 NVFEL Library/Ann Arbor, MI 04/16/2012
NTIS  PB82-103326 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10, [3] p. : charts ; 28 cm.
This report consolidates results from a number of emission testing programs on in-use passenger cars. Vehicles from the 1975 through 1981 model years were involved. The purpose of this effort was to examine the effect of 'high mileage' on levels of exhaust emissions. The emission levels from the vehicles involved were examined from four basic views: (1) 'As received' results of the top 15% (by odometer) versus similar results from the bottom 15% and 85%; (2) 'as received' results of vehicles with over 50,000 miles versus those with under 50,000; (3) the effects of restorative maintenance on high mileage vehicles; and (4) the effects of catalyst replacement on high mileage vehicles. The results show that the high mileage vehicles exhibit higher average HC and CO emissions than the lower mileage vehicles. The higher emission levels appear to be due to an increased rate of maladjustments, disablements and defective parts. It was also found that on the average, catalytic converters remain active beyond a vehicle's statutory 'useful life' of 50,000 miles and that restorative maintenance is an effective method to reduce average emission levels. Even further reductions were possible, especially in HC, through replacement of the catalytic unit.
Includes bibliographical references (p. 10) "EPA-AA-TEB-81-20." "July 1981." Cover title.